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<head>
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    <title>Document</title>
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<body>
    <!-- <input type="text"></body><br> -->

    <!-- <input type="password"> -->

    <!-- 性别
    <input type="radio" name="sex">男
    <input type="radio" name="sex">女
    <input type="radio" name="sex">保密 -->

    <!-- 爱好：
    <input type="checkbox"> 唱
    <input type="checkbox"> 跳
    <input type="checkbox"> rap
    <input type="checkbox"> 篮球 -->

    <!-- <input type="button" value="我是一个按钮"> -->

    <!-- <input type="button" value="我是一个按钮" onclick="alert('hello')"> -->

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        <input type="text" name="username">
        <input type="submit" value="提交">
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    <!-- <select>
        <option>北京</option>
        <option selected="selected">上海</option>
        <option>深圳</option>
    </select> -->

    <!-- <textarea rows="3" cols="50">
        afaafwawf
        afwwaf
    </textarea> -->

    <div>
        <span>咬人猫</span>
        <span>咬人猫</span>
        <span>咬人猫</span>
    </div>
    <div>
        <span>兔总裁</span>
        <span>兔总裁</span>
        <span>兔总裁</span>
    </div>
    <div>
        <span>阿叶君</span>
        <span>阿叶君</span>
        <span>阿叶君</span>
    </div>
</body>
</html>